Couldn't find a guide or way to download Re-Volt for Mac with extra content. Here you go.
Step One:
Download zip file and extract to applications.
Step Two:
Start Revolt and play a round or two and then close and quit Re-Volt.
Step Three:
Open up the Finder Application.
Step Four:
Move mouse to top left of screen and find "Go".
Step Five:
Click on "Computer" it will now open up a finder window exactly where you need to start the process of adding in new extra community made content.
Step Six:
Navigate as such:
Macintosh HD (Computer)
V
Users
V
(Your User Name)
Step Seven:
You need to find the library folder, but for some dumb reason Apple likes to hide it. Left click and click again on "Show view options" a pop up will appear and scroll all the way down to the bottom to find "Show Library Folder" enable that and exit back to where we just were.
Step Eight:
Navigate as such:
Library
V
Application Support
Step Nine:
Drag and Drop RVGL Folder into Application Support and you should now have all Extra Cars and Tracks at your disposal!
Step Ten: Enjoy and Praise original creators of Re-Volt!
I hope this helped you guys, I spent almost a whole weeks worth of nights trying to add cars and tracks to my Mac so I could play with my SteamDeck friends.
The Assets I used came from the following websites: